ce4f660965
1999-02-22 Martin Baulig <martin@home-of-linux.org> * COPYING.LIB: Include a copy of the GNU Library General Public License here. * copyright.txt: Set the year to 1998-99 and pretty-format it a little bit. Same in all C source and header files.
95 lines
2.4 KiB
C
95 lines
2.4 KiB
C
/* $Id$ */
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/* Copyright (C) 1998-99 Martin Baulig
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This file is part of LibGTop 1.0.
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Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998.
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LibGTop is free software; you can redistribute it and/or modify it
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under the terms of the GNU Library General Public License as published
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by the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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LibGTop is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
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License for more details.
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You should have received a copy of the GNU Library General Public
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License along with LibGTop; see the file COPYING.LIB. If not, write
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to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA.
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*/
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#include <config.h>
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#include <glibtop/error.h>
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#include <glibtop/loadavg.h>
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static const unsigned long _glibtop_sysdeps_loadavg =
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(1 << GLIBTOP_LOADAVG_LOADAVG);
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static const unsigned long _glibtop_sysdeps_loadavg_tasks =
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(1 << GLIBTOP_LOADAVG_NR_RUNNING) +
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(1 << GLIBTOP_LOADAVG_NR_TASKS) +
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(1 << GLIBTOP_LOADAVG_LAST_PID);
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/* Init function. */
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void
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glibtop_init_loadavg_s (glibtop *server)
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{
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server->sysdeps.loadavg = _glibtop_sysdeps_loadavg;
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}
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/* Provides load load averange. */
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#define FILENAME "/proc/loadavg"
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void
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glibtop_get_loadavg_s (glibtop *server, glibtop_loadavg *buf)
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{
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char buffer [BUFSIZ], *p, *old;
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int fd, len;
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glibtop_init_s (&server, GLIBTOP_SYSDEPS_LOADAVG, 0);
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memset (buf, 0, sizeof (glibtop_loadavg));
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fd = open (FILENAME, O_RDONLY);
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if (fd < 0)
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glibtop_error_io_r (server, "open (%s)", FILENAME);
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len = read (fd, buffer, BUFSIZ-1);
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if (len < 0)
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glibtop_error_io_r (server, "read (%s)", FILENAME);
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close (fd);
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buffer [len] = '\0';
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buf->loadavg [0] = (float) strtod (buffer, &p);
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buf->loadavg [1] = (float) strtod (p, &p);
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buf->loadavg [2] = (float) strtod (p, &p);
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buf->flags = _glibtop_sysdeps_loadavg;
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while (isspace(*p)) p++;
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/* Older Linux versions don't have the nr_running/nr_tasks fields. */
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old = p;
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while (*p) {
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if (*p == '/')
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break;
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if (!isdigit (*p))
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return;
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p++;
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}
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buf->nr_running = strtoul (old, &p, 0); p++;
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buf->nr_tasks = strtoul (p, &p, 0);
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buf->last_pid = strtoul (p, &p, 0);
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buf->flags |= _glibtop_sysdeps_loadavg_tasks;
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}
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